APA (7th ed.) Citation

Zug, G. R. (1966). The penial morphology and the relationships of cryptodiran turtles. [publisher not identified].

Chicago Style (17th ed.) Citation

Zug, George R. The Penial Morphology and the Relationships of Cryptodiran Turtles. Ann Arbor: [publisher not identified], 1966.

MLA (9th ed.) Citation

Zug, George R. The Penial Morphology and the Relationships of Cryptodiran Turtles. [publisher not identified], 1966.